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dwighthibbert56
06.05.2020 •
Chemistry
Predict whether ΔS for each reaction would be greater than zero, less than zero, or too close to zero to decide.
ΔS > 0; ΔS < 0; too close to decide
I2(g) + Cl2(g) > 2ICl(g)
2NOBr(g) > 2NO(g) + Br2(g)
CO2(g) + H2(g) > CO(g) + H2O(g)
2H2O2(I) > 2H2O(I) + O2(g)
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Ответ:
a)
: too close to decide.
b)
:
> 0.
c)
: too close to decide.
d)
:
> 0.
Explanation:
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.
For the reaction:
a)![I_2(g)+Cl_2(g)\rightarrow 2ICl(g)](/tpl/images/0645/6011/99891.png)
In this reaction 2 moles of gaseous reactants are converting to 2 moles of gaseous products. Thus
is too close to decide.
b)![2NOBr(g)\rightarrow 2NO(g)+Br_2(g)](/tpl/images/0645/6011/5dba1.png)
In this reaction 2 moles gaseous reactants is getting converted to 3 moles of gaseous products. Thus the randomness will increase and hence entropy will also increase.Thus
> 0.
c)![CO_2(g)+H_2(g)\rightarrow CO(g)+H_2O(g)](/tpl/images/0645/6011/421b3.png)
In this reaction 2 moles of gaseous reactants are converting to 2 moles of gaseous products. Thus
is too close to decide.
d)![2H_2O_2(l)\rightarrow 2H_2O(l)+O_2(g)](/tpl/images/0645/6011/18211.png)
In this reaction 2 moles liquid reactants is getting converted to 2 moles of liquid and 1 mole of gaseous products. Thus the randomness will increase and hence entropy will also increase.Thus
> 0.
Ответ:
Midpoint formula: (x1 + x2)/2, (y1 + y2)/2, where (x1, y1) and (x2, y2) are the endpoints of the segment
x-coordinate of midpoint = (x1 + x2)/2
5 = (1 + x2)/2
10 = 1 + x2
9 = x2
y-coordinate of midpoint = (y1 + y2)/2
3 = (-5 + y2)/2
6 = -5 + y2
11 = y2